201
FNCA52 TJSJ 191930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST WED AUG 19 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-200800-
SOUTHEAST COASTAL PLAINS-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE NONE SHOWERS
CHANCE PRECIP (%) 20 0 0 10
TEMP (24H TREND) 76 (-2) 93 (+2) 74 94
RH % (24H TREND) 95 (+4) 49 (-15) 88 47
WIND 20FT/EARLY(MPH) E 11 E 16 E 14 E 17
WIND 20FT/LATE(MPH) E 13 E 17 NE 13 E 19 G26
MIXING HGT(FT-AGL/MSL) 4890 5260
TRANSPORT WND (MPH) E 16 E 18
VENT RATE (KT-FT) 68460 84160
DISPERSION 5 5
DSI 4 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-200800-
SOUTHERN HILLS-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 10 0 20
TEMP (24H TREND) 72 (-2) 91 (+5) 71 91
RH % (24H TREND) 99 (+3) 55 (-15) 95 53
WIND 20FT/EARLY(MPH) E 12 E 12 E 14 E 13
WIND 20FT/LATE(MPH) E 12 E 14 E 12 E 14
MIXING HGT(FT-AGL/MSL) 5410 5770
TRANSPORT WND (MPH) E 15 E 16
VENT RATE (KT-FT) 70330 80780
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-200800-
NORTH COASTAL PLAINS-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 0 20
TEMP (24H TREND) 74 (-3) 93 (+2) 74 92
RH % (24H TREND) 100 (+4) 56 (-12) 95 56
WIND 20FT/EARLY(MPH) E 12 E 13 E 19 E 16
WIND 20FT/LATE(MPH) E 11 E 23 E 11 E 20
MIXING HGT(FT-AGL/MSL) 4980 4930
TRANSPORT WND (MPH) E 16 E 16
VENT RATE (KT-FT) 69720 69020
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-200800-
NORTHERN HILLS-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 30 30 0 20
TEMP (24H TREND) 72 (-2) 91 (+2) 72 90
RH % (24H TREND) 100 (+1) 57 (-13) 97 58
WIND 20FT/EARLY(MPH) SE 11 E 11 E 17 E 13
WIND 20FT/LATE(MPH) E 8 E 19 E 9 NE 19
MIXING HGT(FT-AGL/MSL) 6280 5790
TRANSPORT WND (MPH) E 14 E 14
VENT RATE (KT-FT) 75360 69480
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-200800-
WEST COAST-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 10 30
TEMP (24H TREND) 74 (-1) 94 (+2) 72 94
RH % (24H TREND) 100 (+1) 57 (-10) 97 55
WIND 20FT/EARLY(MPH) E 10 E 14 E 14 E 14
WIND 20FT/LATE(MPH) E 13 E 14 E 10 E 14
MIXING HGT(FT-AGL/MSL) 5000 4770
TRANSPORT WND (MPH) E 15 E 10
VENT RATE (KT-FT) 65000 42930
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-200800-
EASTERN INTERIOR-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 10 30
TEMP (24H TREND) 74 (-2) 91 (+3) 73 91
RH % (24H TREND) 100 (+3) 56 (-11) 96 56
WIND 20FT/EARLY(MPH) SE 14 E 13 E 14 E 13
WIND 20FT/LATE(MPH) E 14 E 13 E 13 E 13
MIXING HGT(FT-AGL/MSL) 5940 6100
TRANSPORT WND (MPH) E 16 E 15
VENT RATE (KT-FT) 83160 79300
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-200800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 10 20
TEMP (24H TREND) 71 (-2) 86 (+3) 71 86
RH % (24H TREND) 100 (+1) 63 (-13) 97 63
WIND 20FT/EARLY(MPH) SE 11 E 11 E 12 E 11
WIND 20FT/LATE(MPH) E 11 E 11 E 11 E 11
MIXING HGT(FT-AGL/MSL) 4620 4880
TRANSPORT WND (MPH) E 17 E 15
VENT RATE (KT-FT) 69300 63440
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-200800-
CENTRAL MOUNTAIN RANGE-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 40 0 20
TEMP (24H TREND) 69 (-3) 89 (+6) 68 89
RH % (24H TREND) 100 (+1) 58 (-19) 99 59
WIND 20FT/EARLY(MPH) SE 6 E 10 E 9 E 10
WIND 20FT/LATE(MPH) E 8 E 11 E 6 E 12
MIXING HGT(FT-AGL/MSL) 8320 7730
TRANSPORT WND (MPH) E 9 E 10
VENT RATE (KT-FT) 66560 69570
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-200800-
CAYEY MOUNTAIN RANGE-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 10 30
TEMP (24H TREND) 72 (-2) 86 (+2) 71 87
RH % (24H TREND) 100 (0) 63 (-10) 95 61
WIND 20FT/EARLY(MPH) E 10 E 11 E 12 E 12
WIND 20FT/LATE(MPH) E 10 E 13 E 11 E 12
MIXING HGT(FT-AGL/MSL) 4940 5230
TRANSPORT WND (MPH) E 16 E 17
VENT RATE (KT-FT) 69160 78450
DISPERSION 5 5
DSI 4 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-200800-
VIEQUES-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 10 10 10
TEMP (24H TREND) 79 (-1) 91 (+1) 79 91
RH % (24H TREND) 87 (0) 55 (-7) 80 55
WIND 20FT/EARLY(MPH) E 18 E 16 E 18 E 14
WIND 20FT/LATE(MPH) E 17 E 16 E 17 E 14
MIXING HGT(FT-AGL/MSL) 4020 4040
TRANSPORT WND (MPH) E 17 E 20
VENT RATE (KT-FT) 60300 68680
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-200800-
CULEBRA-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 10 20
TEMP (24H TREND) 79 (-1) 91 (+2) 79 91
RH % (24H TREND) 92 (+2) 58 (-11) 84 57
WIND 20FT/EARLY(MPH) E 18 E 16 E 17 E 14
WIND 20FT/LATE(MPH) E 18 E 16 E 17 E 14
MIXING HGT(FT-AGL/MSL) 3790 3840
TRANSPORT WND (MPH) E 17 E 18
VENT RATE (KT-FT) 56850 61440
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-200800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 10 0 10
TEMP (24H TREND) 76 (-1) 94 (+3) 75 94
RH % (24H TREND) 95 (+4) 51 (-12) 87 50
WIND 20FT/EARLY(MPH) E 13 E 20 E 20 E 20
WIND 20FT/LATE(MPH) E 18 SE 19 E 17 E 21
MIXING HGT(FT-AGL/MSL) 4890 4700
TRANSPORT WND (MPH) E 22 E 20
VENT RATE (KT-FT) 92910 79900
DISPERSION 5 5
DSI 5 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-200800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 10 20
TEMP (24H TREND) 78 (-2) 89 (+2) 79 89
RH % (24H TREND) 90 (+1) 59 (-10) 84 59
WIND 20FT/EARLY(MPH) E 19 E 17 E 17 E 16
WIND 20FT/LATE(MPH) E 18 E 17 E 18 E 16
MIXING HGT(FT-AGL/MSL) 3990 4010
TRANSPORT WND (MPH) E 20 E 20
VENT RATE (KT-FT) 67830 68170
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-200800-
ST CROIX-
330 PM AST WED AUG 19 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 10 10
TEMP (24H TREND) 79 (-1) 90 (+2) 79 90
RH % (24H TREND) 90 (-1) 59 (-10) 85 60
WIND 20FT/EARLY(MPH) E 18 E 17 E 18 E 16
WIND 20FT/LATE(MPH) E 17 E 16 E 17 E 16
MIXING HGT(FT-AGL/MSL) 4450 4660
TRANSPORT WND (MPH) E 21 E 21
VENT RATE (KT-FT) 80100 83880
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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